You should be able to set the virtualAttribute to something different by passing in the options with it defined. It wraps whatever you pass in with "ko ...:".
// you can now do this
var bindings = { ... };
ko.bindingProvider.instance = new ko.classBindingProvider(bindings, {
"attribute": "data-ext-bind",
"virtualAttribute": "ext-bind"
});
You should be able to set the virtualAttribute to something different by passing in the options with it defined. It wraps whatever you pass in with "ko ...:".